Abstract <p>Electrochemical studies of an aluminum-ion battery (AIB) prototype using galvanostatic electrolysis, impedance spectroscopy, and cyclic voltammetry were conducted at temperatures ranging from –30 to 25°C. Long-term exposure to low temperatures did not alter the AIB’s electrochemical characteristics over 2050 charge–discharge cycles, and its Coulombic efficiency was close to 100%. The study demonstrated that taking the ohmic voltage drop into account when selecting the operating voltage range leads to an increase in the carbon cathode’s capacity. The carbon cathode capacities obtained at a current density of 40 mA g^–1 and AIA discharge in the corrected voltage ranges are 60, 50, 34.5, and 20 mA h g^–1 at 25, 0, –10, and –20°C, respectively. A positive effect of high charging current density on the discharge capacity of the carbon positive electrode was also noted. At a charging current density of 227 mA g^–1 (the AIB charge was completed in 19 min), the discharge capacity was 69 mA h g^–1, and the discharge current density (40 or 227 mA g^–1) did not affect the discharge capacity.</p>